#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{
	int n = 0;
	int i = 0;
	int ret = 1;
	int sum = 0;
	for (n=1;n<=10;n++)
	{
	     ret = 1;
for (i = 1; i <= n; i++)
		{
			ret *= i;

		}
		sum+=ret;
	}
	printf("%d\n", sum);

	return 0;
}
